Mark E. McKeen concentrates on complex commercial and real estate litigation and trial/arbitration practice, with emphasis in real property law, corporate, partnership and transactional disputes, business torts, unfair competition, intellectual property, environmental claims, and bankruptcy proceedings. He is co-chair of DLA Piper's national Real Estate Litigation Practice, and the former litigation chair of the San Francisco office of a major national law firm.

Mark has substantial experience in the representation of emerging growth technology companies, publicly held companies and general and limited partnerships. He has litigated federal and state court cases throughout California, as well as in Washington, Texas, New Mexico, Florida, New York, Colorado, Arizona, North Carolina and Puerto Rico.